31results about How to "Stable fluidization" patented technology

The invention relates to a coal powder conveying device which comprises a coal grinder, wherein a raw coal inlet is formed in the coal grinder; an outlet of the coal grinder is connected with an inlet of a coal powder filter; an outlet positioned in the lower side of the coal powder filter is connected with a spiral feeder, a normal pressure cabin and a lock bucket through pipelines in sequence from top to bottom; an outlet pipeline of the lock bucket is communicated with a carrier gas pipeline and is connected with an inlet of a feeding cabin above the coal powder filter through the carrier gas pipeline; an outlet in the bottom of the feeding cabin is connected with a mechanical feeding device below the feeding cabin; an outlet positioned in the lower side of the mechanical feeding device is connected with a gas coning part and a burning nozzle of a gasification furnace through pipelines in sequence from top to bottom, and coal powder is sprayed into the gasification furnace through the burning nozzle; the burning nozzle of the gasification furnace is lower than the feeding cabin, and the lock bucket is arranged below the burning nozzle of the gasification furnace. The coal powder conveying device has the characteristics of stability in coal powder conveying, accuracy in metering, energy conservation, consumption reduction and the like, and is capable of reducing carrier gas entering the furnace.

The invention discloses a dry-process deslagging fluidized bed gasification reaction device which comprises a reactor body, a multi-stage cyclone separating device, an air distribution device, a feed system and a return system. The dry-process deslagging fluidized bed gasification reaction device disclosed by the invention adopts a circulating fluidized bed reactor as a gasification reaction body, realizes the dry-process deslagging by adopting medium-high temperature gasification, achieves the purpose of improving carbon transformation rate and cooled coal gas efficiency by adopting two-stage type graded gasification, enhances the operation and running stability by combining a simplified deslagging device and an air distribution plate design, is suitable for the gasification transformation of various carbon-containing solid fuels and has large-scale popularization and application prospect.

The invention discloses a fluidizing and spray-drying granulator. The granulator comprises a trapping chamber, a spraying chamber, a fluidizing chamber and an air inlet chamber which are sequentially arranged from top to bottom, wherein an air inducing pipe is arranged on the side wall of the upper part of the trapping chamber and connected with an induced draft fan, a bag filter is arranged in a position where the bottom of the trapping chamber and the top of the spraying chamber are connected, a position-adjustable spraying device is arranged in the spraying chamber, a perforated fluidizing plate is arranged in a position where the bottom of the fluidizing chamber and the top of the air inlet chamber are connected, an air inlet pipe is arranged on the side wall of the lower part of the air inlet chamber, and a filter, a dehumidifier and a heater are arranged on the air inlet pipe. The spraying device and the perforated fluidizing plate are movably connected, relative positions of all spraying guns, the spraying amount, the auxiliary material amount and the aperture ratio of the perforated fluidizing plate can be adjusted according to granulation requirements, and enlargement of the liquid atomization range and stable fluidization of seed powder are realized, so that the production efficiency and the product quality are improved, and the drying energy consumption is reduced.

The invention relates to a coal variable-amplitude vibration fluidized bed drying and sorting system and a sorting method and belongs to the technical field of coal drying and sorting devices. The coal variable-amplitude vibration fluidized bed drying and sorting system is used for solving the technical problem that an existing coal drying device is poor in drying effect, and the sorting efficiency is difficult to improve. The drying and sorting system comprises a drying and sorting unit, an air supply unit, a feeding unit, a discharging unit, an induced draft dust-removing unit and a supporting unit. The air supply unit and the induced draft dust-removing unit are connected with the bottom and the top of the drying and sorting unit correspondingly. The supporting unit is used for supporting the drying and sorting unit. The drying and sorting unit is internally provided with a dividing plate and is divided into a drying section bed body and a sorting section bed body, wherein the top of the drying section bed body and the top of the sorting section bed body are provided with a drying section vibration exciting device and a sorting section vibration exciting device correspondingly,and the vibration amplitude of the drying section vibration exciting device is larger than that of the sorting section vibration exciting device. The coal variable-amplitude vibration fluidized bed drying and sorting system achieves integration of drying and sorting and has the characteristics of a good drying effect, high sorting efficiency, low cost, wide application range, convenient operationand the like.

The invention discloses an ultrafine particle mixing device. An ultrafine particle mixing device system comprises a hopper, a spiral feeder, a Roots blower, an air chamber, a circulating fluidized bed, a cyclone dust collector, a vertical pipe, a material returning device, a bag-type dust collector and a material collector, wherein the circulating fluidized bed comprises a low speed bed, a transitional section and a high speed bed; a porous plate is arranged at the upper part of the air chamber as an air distribution plate; and the bag-type dust collector is connected with the cyclone dust collector. Ultrafine particles and auxiliary fluidized particles are available in the low speed bed. The auxiliary fluidized particles are added to the low speed bed through an auxiliary fluidized particle storage bin. The number of the types of the ultrafine particles is not less than two. The particle sizes of the ultrafine particles are less than 100 microns. The Roots blower supplies inert fluidizing gas which does not react with the ultrafine particles. The particle sizes of the auxiliary fluidized particles are more than 100 microns and less than 100 mm. A feeding device is the spiral feeder.

The invention relates to a combined fluidized bed slag cooler, which comprises a body, a wind box, an air distributing device, a slag inlet pipe, a slag outlet pipe, an air inlet pipe and an air outlet pipe. The body is provided with the slag inlet pipe, and the bottom of the body is connected with the slag outlet pipe. The lower part of the body is provided with the air distributing device and connected with the wind box of the air inlet pipe, and the top of the body is connected with the air outlet pipe. The slag outlet pipe is provided with a spraying pipe for air intake inside to make thethree working areas with different flowing states formed from the lower part to the upper part in the body, the lower part is a spraying area, the middle part is an annular fluidizing area, and the upper part is a suspending and settling area. The upper side of the spraying pipe is provided with a guide pipe. The outlet of the slag outlet pipe is provided with a mechanical slag outlet valve or a conveyor. The transverse and longitudinal mixing of gas-solid two-phase in the bed is obviously strengthened under the coaction of spraying air and fluidizing air. The problems of poor transverse mixing, easy accumulation of local bed materials, delamination, aggregation and the like of the fluidized bed slag cooler are solved. The furnace slag granules can be sufficiently and effectively cooled. The combined fluidized bed slag cooler is used for cooling bottom slag of a CFB boiler or other high-temperature solid granular materials.

A granulating, fluidizing and drying system is provided with a vibration fluidizing machine, a granulating machine, a cyclone separator, a water film dust remover, a crusher, a heating device and a cooling device. A ventilation area on a bed plate of the vibration fluidizing machine is formed by connecting round unit ventilation areas which are arranged in a line. A screening device is arranged at the tail end of the bed plate, air holes at the middle square positions of the unit ventilation areas on the bed plate are straight holes, and air holes on four bow-shaped parts of the unit ventilation areas on the bed plate are scale holes. The air outlet direction of the scale holes on two bow-shaped parts on the front part in each unit ventilation area is towards a box wall, and the air outlet direction of the scale holes on two bow-shaped parts on the rear part in each unit ventilation area is towards the connection position of two unit ventilation areas. Air inlet tubes corresponding to the unit ventilation areas one by one are arranged in an air chamber. The granulating, fluidizing and drying system can integrally achieve granulation, drying, cooling and screening, has high efficiency, treats exhausted tail gas, and is favorable for environment protection. By means of a special shape of the bed plate and the distribution of the air holes, fluidization of the vibration fluidizing machine is stable and free of dead corners.

The invention discloses a device for removing CO2 from flue gas in a power plant by using fly ash. The device comprises an activation reactor, a charging device, a fluidized bed, a cyclone separator and a waste material bin, wherein the output end of the activation reactor is connected with the charging device; the output end of the charging device is connected with the fluidized bed; the output end of the fluidized bed is connected with the cyclone separator; and the output end of the cyclone separator is connected with the waste material bin. The invention also discloses a method for removing the CO2 from the flue gas in the power plant by using the fly ash. The method comprises the following steps: conveying the fly ash into the activation reactor and carrying out activation treatment, then carrying out conveying into the charging device and carrying out charging treatment, then carrying out conveying into the fluidized bed so as to remove the CO2 in the flue gas, and finally carrying out conveying into the waste material bin. According to the invention, the device organically combines with a coal-fired power generating system; the flue gas and cold air in the coal-fired power plant can be utilized to provide a heat source and a cold source for the device; meanwhile, needed electric energy is provided for the device through a thermoelectric power generation technology; thus, an optimization scheme capable of reducing cost and energy consumption is realized.

The invention discloses a magnetic catalyst for denitration of NH3-SCR smoke. The NH3-SCR active component of the catalyst is magnetic iron oxide; and a carrier is perovskite type lanthanum-manganese metal oxide composite or lanthanum of which lanthanum and manganese are partially replaced by alkali metal and transition metal. The invention also discloses application of the catalyst in denitration of NH3-SCR smoke. A magnetic fluid bed reactor with coupling magnetic induction of 0.01-0.1 T is adopted to add the magnetic catalyst at an air speed of 4,000-6,000 h-1; and high NH3-SCR reaction activity is always shown under the conditions that the NH3 / NO molar ratio is 1.0-1.3, the O2 content is 2-12% and a relatively wide range of reaction temperature is from 200 DEG C to 400 DEG C, and the denitration is over 80%. Due to relatively wide range of reaction temperature, various dedusting ways are available for the catalyst, and the method is NH3-SCR technology suitable for low and medium temperature.

The invention belongs to the field of toxic and refractory wastewater treatment and provides advanced oxidation reactors with two structural forms and toxic and refractory wastewater treatment devices with two structural forms. Each toxic and refractory wastewater treatment device integrates three stages of reactors through coupling. The invention further provides toxic and refractory wastewater treatment methods. According to the methods, persulfate and a micro-grade microelectrolysis material are added to first-stage reactors of the wastewater treatment devices, hydrogen peroxide and persulfate are added to second-stage reactors, the micro-grade microelectrolysis material is added to second-stage reactors, and then a Fenton-like reaction, a Fenton reaction and an activated persulfate oxidization reaction are effectively coupled in the three stages of reactors; with the adoption of the methods, the wastewater treatment effect can be enhanced and improved, and the wastewater treatment cost can be reduced.

The invention relates to a three-plasmid whole sealing environmentally friendly vibration fluidized bed dryer which is suitable for drying powder material of regular shape such as Laroflex MP with granularity ranging from 50mu m to 5000mu m. The drier comprises a foundation (9), a lower housing (13), a fluidized bed body (6), an upper housing (18) and a bag type dust collector (24); wherein the lower housing (13) is supported on the foundation (9) by a slantly arranged plate spring (12), a case type vibration exciter (14) is arranged at the front end of the lower housing (13), the fluidized bed body (6) is arranged above the lower housing (13) and internally provided with a hood-shaped fluidized bed plate (7), the upper housing (18) is arranged above the fluidized bed body (6) and internally provided with a plurality of groups of bag type dust collectors (24). An air-reserve tank (24.6) is arranged outside the upper housing (18), a plurality of air branch pipes (24.3) are internally arranged in the air-reserve tank (24.6), wherein each air branch pipe (24.3) is provided with a pulse solenoid valve (24.5), the bottom part thereof is provided with an air source hole (24.7). The drier of the invention features low energy consumption, high production efficiency, good operation stability and good uniformity of products.

The invention discloses a system and a method for trapping power plant smoke carbon dioxide by rice husk gasified coupled sodium silicate. The system comprises a rice husk gasified coupled Na2SiO3 preparation furnace, a charge electric appliance, an electric field auxiliary fluidized reactor, a material separation apparatus, a dissolving device and a filter which are connected in sequence, whereinan input end of the rice husk gasified coupled Na2SiO3 preparation furnace is an inlet for synthetic raw materials, O2 and Na2CO3 solution, and an output end is also connected with a first heat exchanger; a second heat exchanger is arranged in the electric field auxiliary fluidized reactor; the material separation apparatus is two levels of cyclone separators which are connected successively, theupper output end of the two levels of cyclone separators is connected with a third heat exchanger, a lower output end of the two levels of cyclone separators is connected to the electric field auxiliary fluidized reactor, and an additional pipeline is arranged to connect a fourth heat exchanger and a dissolving device; and an output end of the filter is connected to the rice husk gasified coupledNa2SiO3 preparation furnace. The system is organic combined with a coal fired power generation system, and the smoke of a coal fired power station exchanges heat with a bed body to keep the temperature constant, and the scheme is low in investment cost and low in energy consumption.